The best mentoring I received was through the Aviation Safety Digest, free of charge and delivered each and every month and read from cover to cover. That was mid 1960's and the frequency of VFR into IMC accidents was alarming at that time. The digest hammered home the subject and other high incidence prangs.
Probably the only mistake I didn't make in my aviation progression was that and I thank the DCA and the Digest for making the effort.